Login url in linux branch is incorrect and should be the same as master branch.
This is related to issue #23 especially this comment #23 (comment)

The URL should be : "https://account.xiaomi.com/pass/serviceLogin?sid=unlockApi&json=false&passive=true&hidden=false&_snsDefault=facebook&checkSafePhone=true&_locale=" + Locale.getDefault().getLanguage().toLowerCase();" at file "./src/main/java/com/xiaomitool/v2/gui/controller/LoginController.java" line 39 for linux branch and mac branch.